Malicious PDF — malware analysis report

Static analysis result for SHA-256 c310b3e2211a8022…

MALICIOUS

PDF

51.5 KB Created: 2020-09-30 05:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 94f5356db4cc90502c9604599cb21ead SHA-1: 232d95bf3f8b54bed83637eb1a3187ee19978657 SHA-256: c310b3e2211a80222ede75802606f5ae32c33c1acc689026b9200a69a559a884
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=digestion+absorcion+y+transporte+de+lipidos+pdf In PDF document text
    • http://files.foundinfirestudios.com/uploads/1/3/0/7/130775677/vexomesot.pdfIn PDF document text
    • http://rofap.isabelwitte.org/uploads/1/3/1/3/131397971/dogesimemaziz-xozukiwazubatix.pdfIn PDF document text
    • http://files.sunmedicineemotions.com/uploads/1/3/1/4/131454151/6870802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c235a3-5100-4152-957c-a3df6ca0f102/timerodagujeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544c1cf4-4b20-408e-84cb-34102d881fb1/23400953232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca090c7-8db8-4b9f-9afd-ccd0ac60e421/9033679925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9324/4570/files/witcher_3_hook_matches_count_check_error.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/gavotirizekepen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/adverbs_worksheet_for_7th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/56198372107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4438/4151/files/lufigenivuwutifilepebej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d46883-2248-437e-bb70-2f7fd193e1b2/85236907672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca5f68d-7aae-49d8-9055-81f1a4a7f193/sinogesugonanabudibaga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000893b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893B 5564 bytes
SHA-256: db034893e95b40700e08e076335b05a0fd3f20c33b10c0507155e51d3a105fca
font_01_sfnt_off00009c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C46 10676 bytes
SHA-256: eebf490958d74f34ef8b784a3b1008154d118e84cc8ed2fc3ca09f4ee560a0ab

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